Robert Clarkのインスタグラム(robertclarkphoto) - 4月10日 07時00分

The wing of a #LesserSnowGoose, which is a far migrating member of the Anserini group of White Geese. The photo shows the birds high-altitude slotted wing which allows the goose to fly long distances with high efficiency with very low cost in energy. The feather projection on the top- right portion of the image is a small "thumb" that the bird used to change the way that wind passes over it's wing, allowing the bird to alter its angle of flight. Thank you to @ナショナルジオグラフィック for the shout out of some of the in the new book Feathers Display of Brilliant Plumage. Check out the link in my bio for whole. @ナショナルジオグラフィック post. @thephotosociety

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